Here are a few for you,here's a guy that i've bought from on EBay- good seller (& composer- musicain) for big top music;
http://cgi.ebay.com/CIRCUS-CLOWN-CAL...QQcmdZViewItem
http://cgi.ebay.com/CARNIVAL-MIDWAY-...QQcmdZViewItem
http://cgi.ebay.com/RAGTIME-HONKY-TO...QQcmdZViewItem
And these guys;
http://www.somethingwickedproductions.com/
Zombos midnite midway-free download ( BEST psycho clown yet)-
http://www.sinistersonics.com/
3rd one down- Midnight Circus-
http://www.hedstorm.net/
Midnight syndicates Carnival of lost Souls (3rd one down)-
http://www.*******************/Music.htm
Hope those might help, I'm BIG on the clown / circus twisted & psycho music !